A common variant in ERBB4 regulates gaba concentrations in human cerebrospinal fluid

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The neuregulin 1 (NRG1) receptor ErbB4 is involved in the development of cortical inhibitory GABAergic circuits and NRG1-ErbB4 signaling has been implicated in schizophrenia (SCZ). A magnetic resonance spectroscopy (1 H-MRS) study has demonstrated that a single-nucleotide polymorphism in ERBB4, rs7598440, influences human cortical GABA concentrations. Other work has highlighted the significant impact of this genetic variant on expression of ERBB4 in the hippocampus and dorsolateral prefrontal cortex in human post mortem tissue. Our aim was to examine the association of rs7598440 with cerebrospinal fluid (CSF) GABA levels in healthy volunteers (n155). We detected a significant dose-dependent association of the rs7598440 genotype with CSF GABA levels (G-allele standardized Β0.23; 95% CIs: 0.39 to 0.07; P0.0066). GABA concentrations were highest in A homozygous, intermediate in heterozygous, and lowest in G homozygous subjects. When excluding subjects on psychotropic medication (three subjects using antidepressants), the results did not change (G-allele standardized Β0.23; 95% CIs: 0.40 to 0.07; P0.0051). The explained variance in CSF GABA by rs7598440 in our model is 5.2% (P0.004). The directionality of our findings agrees with the aforementioned 1 H-MRS and gene expression studies. Our observation therefore strengthens the evidence that the A-allele of rs7598440 in ERBB4 is associated with increased GABA concentrations in the human central nervous system (CNS). To our knowledge, our finding constitutes the first confirmation that CSF can be used to study genotype-phenotype correlations of GABA levels in the CNS. Such quantitative genetic analyses may be extrapolated to other CSF constituents relevant to SCZ in future studies.

Detaljer

Författare
  • Jurjen J. Luykx
  • Christiaan H. Vinkers
  • Steven C. Bakker
  • Wouter F. Visser
  • Loes Van Boxmeer
  • Eric Strengman
  • Kristel R. Van Eijk
  • Judith A. Lens
  • Paul Borgdorff
  • Peter Keijzers
  • Teus H. Kappen
  • Eric P.A. Van Dongen
  • Peter Bruins
  • Nanda M. Verhoeven
  • Tom J. De Koning
  • René S. Kahn
  • Roel A. Ophoff
Externa organisationer
  • Utrecht University
  • St. Antonius Hospital
  • University Medical Center Groningen
  • Wilhelmina Children’s Hospital
  • University Medical Center Utrecht
  • University of California, Los Angeles
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Neurovetenskaper

Nyckelord

Originalspråkengelska
Sidor (från-till)2088-2092
Antal sidor5
TidskriftNeuropsychopharmacology
Volym37
Utgåva nummer9
StatusPublished - 2012 aug 1
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa